im sure this has been answered but the search is not working for me right now. I am using iprep 8.8 on a vista x64 system.

I try to load a firmware version, (any of them) i need to use benq 1.4 and everytime it says no valid firmware loaded. ive tried the .bin and also the .rar file and nothing. i have a via chipset and i dont know what else you guys need.

Have you placed the relevant ixDef.xml file in the resources directory of iPrep as that is probably whats wrong. You will need the ixDef.xml file that was created for the iXtreme 1.4 firmware if thats what you want to load.

Oh iPrep works just fine in Vista 64bit as thats the OS i use to make my bootable USB drive & i've never had any problems ever..